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Asanuma H, Nakai H, Takeda M, Shishido S, Kawamura T, Nagakura K, Yamafuji M. [Clinical study on cystinuria in children--the stone management and the prevention of calculi recurrence]. Nihon Hinyokika Gakkai Zasshi 1998; 89:758-65. [PMID: 9796255 DOI: 10.5980/jpnjurol1989.89.758] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
BACKGROUND Cystinuria is an autosomal recessive disorder, and primary manifestation is the repeated formation of cystine calculi. Little information is available regarding clinical course of pediatric cystinuria having followed into adulthood. We report our experience with the management and the clinical course on cystinuria in children, who have been followed up for relatively long time. MATERIALS AND METHODS We retrospectively reviewed the records of all pediatric patients with cystinuria in whom urolithiasis was treated from 1970 to 1996. RESULTS A total of 15 pediatric patients with cystine calculi (9 boys, 6 girls) were treated in our hospital. Average age at diagnosis was 3 years 4 months old. Mean follow-up was 104 months. Stone location was upper urinary tract in 11 cases, bladder in 3 cases and both upper urinary tract and bladder in 1 case. Medical treatments including hydration, urine alkalization and dissolution therapy were performed in all patients. In three cases whose urinary cystine level ranged from 138 to 326 mg/gCr, cystine calculi were disappeared by medical therapy alone. In one of 3 cases vesicoureteral reflux was identified. Side effects were noticed in 30.0% of patients with tiopronin and in 85.7% of those with D-penicillamine, especially in 1 case with tiopronin nephrotic syndrome being noticed. Surgical procedures were performed in 13 patients (lithotomy: 17 calculi, endourology: 7 calculi and ESWL: 7 calculi). The stone free rate was 100% with lithotomy, 80 to 100% with endourology and 43% with ESWL at an average of 5.9 procedures. No complications were recognized after the surgical treatments. The stone events of 15 patients ranged from 0 to 1.5 (average 0.55). In all six patients followed up over the age of 20 years, stone recurrences were observed exclusively between 17 and 20 years of age. CONCLUSION Dissolution therapy is more effective for cystinuric patients in whom urinary cystine excretion is less than 330 mg/gCr. For those cases with low urinary cystine level it is necessary to evaluate structural abnormalities of the urinary tract to avoid stone recurrence. ESWL and endourology should be tried for pediatric cystinuria except for neonates and infants, considering its safety. The patients and their parents must have adequate knowledge about the disease itself and its management. Prevention of cystine calculi recurrences depends on patient compliance to the therapeutic regimens necessitating close follow up according to the clinical conditions, especially for those in pubertic or postpubertic age.
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Affiliation(s)
- H Asanuma
- Department of Urology, Tokyo Metropolitan Kiyose Children's Hospital
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202
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Azuma T, Nakai H, Fukuzawa M, Wasa K, Takagi Y, Okada A. Potential candidates for small bowel transplantation: from our experience and survey of home parenteral nutrition in Japan. Transplant Proc 1998; 30:2529-30. [PMID: 9745472 DOI: 10.1016/s0041-1345(98)00712-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- T Azuma
- Department of Pediatric Surgery, Osaka University Medical School, Japan
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203
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Hayashi Y, Nakai H, Tokita Y, Nakatsuji H. A theoretical study of the photochemical reductive elimination and thermal oxidative addition of molecular hydrogen from and to the Ir-complex. Theor Chem Acc 1998. [DOI: 10.1007/s002140050327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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204
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Abstract
The purpose of this study was to clarify the change in mandibular condyles under compressive loading. An organ-culture system of fetal rat mandibular condyles was used, and mechanical loading was generated by compressing the gas phase within a closed chamber. After the culture period, with compressive loading, type I collagen and fibronectin were observed in the lower half of the hypertrophic chondrocyte layer in the mandibular condyles; in contrast, without compressive loading, there was no such reaction. The size of the condyle was not increased by compressive loading. These results suggest that intermittent compressive loading could induce type I collagen and fibronectin production by chondrocytes.
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Affiliation(s)
- H Nakai
- Department of Oral Surgery, Nagoya University School of Medicine, Japan
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205
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Nakai H, Herzog RW, Hagstrom JN, Walter J, Kung SH, Yang EY, Tai SJ, Iwaki Y, Kurtzman GJ, Fisher KJ, Colosi P, Couto LB, High KA. Adeno-associated viral vector-mediated gene transfer of human blood coagulation factor IX into mouse liver. Blood 1998; 91:4600-7. [PMID: 9616156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recombinant adeno-associated virus vectors (AAV) were prepared in high titer (10(12) to 10(13) particles/mL) for the expression of human factor IX after in vivo transduction of murine hepatocytes. Injection of AAV-CMV-F.IX (expression from the human cytomegalovirus IE enhancer/promoter) into the portal vein of adult mice resulted in no detectable human factor IX in plasma, but in mice injected intravenously as newborns with the same vector, expression was initially 55 to 110 ng/mL. The expression in the liver was mostly transient, and plasma levels decreased to undetectable levels within 5 weeks. However, long-term expression of human F.IX was detected by immunofluorescence staining in 0.25% of hepatocytes 8 to 10 months postinjection. The loss of expression was likely caused by suppression of the CMV promoter, because polymerase chain reaction data showed no substantial loss of vector DNA in mouse liver. A second vector in which F.IX expression was controlled by the human EF1alpha promoter was constructed and injected into the portal vein of adult C57BL/6 mice at a dose of 6.3 x 10(10) particles. This resulted in therapeutic plasma levels (200 to 320 ng/mL) for a period of at least 6 months, whereas no human F.IX was detected in plasma of mice injected with AAV-CMV-F.IX. Doses of AAV-EF1alpha-F. IX of 2.7 x 10(11) particles resulted in plasma levels of 700 to 3, 200 ng/mL. Liver-derived expression of human F.IX from the AAV-EF1alpha-F.IX vector was confirmed by immunofluorescence staining. We conclude that recombinant AAV can efficiently transduce hepatocytes and direct stable expression of an F.IX transgene in mouse liver, but sustained expression is critically dependent on the choice of promoter.
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Affiliation(s)
- H Nakai
- Avigen, Inc, Alameda, CA, USA
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206
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Suzuki H, Shima M, Kamisue S, Nakai H, Nogami K, Shibata M, Morichika S, Tanaka I, Giddings JC, Yoshioka A. The role of platelet von Willebrand factor in the binding of factor VIII to activated platelets. Thromb Res 1998; 90:207-14. [PMID: 9694242 DOI: 10.1016/s0049-3848(98)00034-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Factor VIII binds to activated platelets and contributes to the tenase complex assembled on the platelet membrane surface. We have examined the role of platelet von Willebrand factor in the binding of factor VIII to platelets using a platelet captured enzyme-linked immunosorbent assay. Purified factor VIII bound to activated normal platelets in a dose dependent manner. Factor VIII also bound to platelets obtained from a patient with Type 2N von Willebrand disease, although in this case the binding was reduced to approximately 50% of that seen with control platelets. Furthermore, factor VIII bound to Type 3 von Willebrand disease platelets in the absence of detectable von Willebrand factor. In this instance the binding reaction appeared to be approximately 30% of that seen with the same number of normal platelets. An anti-A3 domain monoclonal antibody, NMC-VIII/10, which recognizes the amino-terminal acidic region of the factor VIII light chain, and an anti-C2 domain monoclonal antibody, NMC-VIII/5, which also moderates the binding of factor VIII to phosphatidylserine, inhibited the association between factor VIII and platelets. Inhibition was more remarkable with NMC-VIII/5 than with NMC-VIII/ 10 but not complete. The findings suggest that the binding of factor VIII to activated platelets is not based on a single ligand-receptor relationship, although a predominant role exists for the platelet von Willebrand factor. Furthermore, both the amino-terminal acidic region of the A3 domain and the C2 domain participate in the binding of factor VIII to activated platelets.
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Affiliation(s)
- H Suzuki
- Department of Pediatrics, Nara Medical University, Kashihara, Japan
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207
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Abstract
A 2-year, 9-month-old boy had an umbilical fistula after repair of an inguinal hernia at 8 months of age. Fistulography findings showed a duct running from the umbilicus toward the inguinal wound. Pathological finding of the surgically removed fistula demonstrated granulomatous tissues containing silk ligature. Acquired umbilical fistula is a rare complication of inguinal herniorrhaphy. Its clinical details as well as a review of the previously reported four cases are presented.
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Affiliation(s)
- H Okuyama
- Department of Pediatric Surgery, Osaka University Medical School, Suita, Japan
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208
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Nakai H, Niimi A, Fujimoto T, Ueda M. Prosthetic treatment using an osseointegrated implant after secondary bone grafting of a residual alveolar cleft: a case report. Int J Oral Maxillofac Implants 1998; 13:412-5. [PMID: 9638013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Conventionally, for dental reconstruction after bone grafting of the congenital residual alveolar cleft, a fixed prosthesis or removable partial denture is used. In this paper, residual alveolar cleft reconstruction with an osseointegrated implant following secondary bone grafting is described. The patient underwent secondary bone grafting of the residual alveolar cleft at the age of 18 years. One osseointegrated implant was placed in the bone bridge 8 months after bone grafting. No problems up to 1 year after the fabrication and placement of the fixed prosthesis have been observed.
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Affiliation(s)
- H Nakai
- Department of Oral Surgery, Nagoya University School of Medicine, Japan
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209
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Senokuchi K, Nakai H, Nagao Y, Sakai Y, Katsube N, Kawamura M. New orally active enkephalinase inhibitors: their synthesis, biological activity, and analgesic properties. Bioorg Med Chem 1998; 6:441-63. [PMID: 9597188 DOI: 10.1016/s0968-0896(97)10048-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A series of (4S)-4-[(2S)-benzyl-3-mercaptopropionylamino]-4-(N-phenylcarbamoyl )-butyric acids has been identified as potent systemically active enkephalinase inhibitors. Structure-activity relationships (SAR) are discussed. Further chemical modification of the inhibitors was carried out in order to identify the inhibitors which are orally active in an animal model. Compounds of particular interest are the prodrug-like analogues, including 5b (ONO-9902). Their analgesic effects after oral administration were evaluated.
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Affiliation(s)
- K Senokuchi
- Department of Medicinal Chemistry, Minase Research Institute, Ono Pharmaceutical Co., Ltd., Osaka, Japan
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210
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Kamigauchi T, Sakazaki R, Nagashima K, Kawamura Y, Yasuda Y, Matsushima K, Tani H, Takahashi Y, Ishii K, Suzuki R, Koizumi K, Nakai H, Ikenishi Y, Terui Y. Terprenins, novel immunosuppressants produced by Aspergillus candidus. J Antibiot (Tokyo) 1998; 51:445-50. [PMID: 9630870 DOI: 10.7164/antibiotics.51.445] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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211
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Sako K, Nakai H, Kawata Y, Takizawa K, Satho M, Yonemasu Y. Temporary arterial occlusion during anterior communicating or anterior cerebral artery aneurysm operation under tibial nerve somatosensory evoked potential monitoring. Surg Neurol 1998; 49:316-22; discussion 322-3. [PMID: 9508122 DOI: 10.1016/s0090-3019(97)00225-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Median nerve somatosensory evoked potentials (SEP) have been used as an indicator of cerebral ischemia in the territory of the middle cerebral artery. This study was designed to examine whether tibial nerve SEPs are a useful technique for detecting ischemia in the territory of the anterior cerebral artery (ACA) during aneurysm surgery. METHODS Tibial nerve SEP monitoring was employed in 15 patients who underwent temporary arterial occlusion during surgery for aneurysms of the anterior communicating artery (ACoA) or ACA. To evaluate tibial nerve SEPs, the data after anesthesia induction but before the start of surgery were used as the control and a more than 50% decrease in the amplitude of P40-N50 was regarded as a significant change. RESULTS Changes in SEP were recognized in 11 of these 15 patients. Unilateral A1 occlusion resulted in SEP changes in 4/7, while bilateral A1 interruption caused changes in 6/8 of the patient group. The allowable duration of interruption of the ACA cannot be determined by A1 dominance or the extent of development of the ACoA that can be recognized by angiography. The significance of the collateral circulation via the leptomeninges was indicated. Following the release of the occlusion, SEPs were restored to the control level in all patients and no new motor deficits were found. CONCLUSIONS It was concluded that tibial nerve SEP monitoring is a useful system to determine the extent of cerebral ischemia of the ACA territory during temporary arterial occlusion associated with surgery for aneurysms involving the ACA system.
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Affiliation(s)
- K Sako
- Department of Neurosurgery, Asahikawa Medical College, Nayoro City Hospital, Hokkaido, Japan
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212
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Abe M, Nakai H, Tabata R, Saito K, Egawa M. Effect of 5-[3-[((2S)-1,4-benzodioxan-2-ylmethyl)amino]propoxy]-1,3-benzodioxole HCl (MKC-242), a novel 5-HT1A-receptor agonist, on aggressive behavior and marble burying behavior in mice. Jpn J Pharmacol 1998; 76:297-304. [PMID: 9593223 DOI: 10.1254/jjp.76.297] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Behavioral effects of 5-[3-[((2S)-1,4-benzodioxan-2-ylmethyl)amino]propoxy]-1,3-be nzodioxole HCl (MKC-242), a novel 5-HT1A-receptor agonist, were evaluated using animal models of anxiety and obsessive compulsive disorder and compared against reference compounds. MKC-242 suppressed foot shock-induced fighting behavior without loss of motor coordination in mice as the reference compounds did. The ED50 values of MKC-242, buspirone, tandospirone and diazepam were 1.7, 42, 80 and 2.0 mg/kg, p.o., respectively. The duration of the suppression of fighting by MKC-242 was longer than those of buspirone and tandospirone and comparable to that of diazepam. Similar results were also obtained with the water-lick conflict test in rats. The plasma concentration of MKC-242 in rats was much higher than the reported value of buspirone during 0.25-6 hr after oral administration. In addition, MKC-242 reduced marble burying behavior without reduction of motor activity. Fluoxetine, tandospirone and diazepam also reduced the behavior at non-sedative doses. These findings indicate that MKC-242 possesses a longer-lasting anxiolytic effect than azapirones. This might be due to the high concentration of the compound in plasma. In addition, it is also suggested that MKC-242 possesses an antiobsessional effect.
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Affiliation(s)
- M Abe
- Pharmaceuticals Laboratory I, Yokohama Research Center, Mitsubishi Chemical Corporation, Japan
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213
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Abstract
The flexural properties, flexural strength, flexural modulus and modulus of resilience, of four commercially available compomers, and one resin-modified glass ionomer cement and one microfilled resin comosite (as controls) immediately after light-activation and after 1 week of water storage were tested to assess the mechanical properties. The water swelling after storage in water was also tested to assess the characteristics in water of compomers. The flexural test showed compomers to be statistically stronger and more resilient than the resin-modified glass ionomer cement or the microfilled composite, when tested immediately after light-activation and after 1 week of water storage. Water swelling of compomers was statistically less than the resin-modified glass ionomer cement after 1 week of water storage.
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Affiliation(s)
- M Irie
- Department of Dental Materials, Okayama University Dental School, Japan
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214
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Kobayashi S, Nakai H, Ikenishi Y, Sun WY, Ozaki M, Hayase Y, Takeda R. Micacocidin A, B and C, novel antimycoplasma agents from Pseudomonas sp. II. Structure elucidation. J Antibiot (Tokyo) 1998; 51:328-32. [PMID: 9589069 DOI: 10.7164/antibiotics.51.328] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-containing novel heterocyclic antibiotics, micacocidin A (1), B (2), and C (3) have been isolated from the culture filtrate of Pseudomonas sp. No. 57-250. The structure and absolute configuration of micacocidin A, an octahedral Zn2+ complex, was determined by X-ray crystallographic analysis. And then, the structures of the two congeners, micacocidin B (Cu2+ complex) and C (Fe3+ complex) were investigated by employing one dimensional and two dimensional homonuclear and heteronuclear NMR spectroscopies and mass spectrometry.
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Affiliation(s)
- S Kobayashi
- Aburahi Laboratories, Shionogi & Co., Ltd., Japan
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215
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Kitamura N, Nishino N, Hashimoto T, Kajimoto Y, Shirai Y, Murakami N, Yang CQ, Lin XH, Yamamoto H, Nakai T, Mita T, Komure O, Shirakawa O, Nakai H. Asymmetrical changes in the fodrin alpha subunit in the superior temporal cortices in schizophrenia. Biol Psychiatry 1998; 43:254-62. [PMID: 9513734 DOI: 10.1016/s0006-3223(97)00032-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND We examined possible abnormalities in neural structural proteins that may underlie morphometric changes reported in the left superior temporal cortices (Brodmann's area 22) of schizophrenics. METHODS Particulate proteins of the superior temporal cortices taken at autopsy from 11 schizophrenic and 9 control brains were fractionated by gel electrophoresis. Target proteins, identified by reading their amino acid sequences, were immunoquantified using the specific antibody. RESULTS Amino acid sequences of the 150-kDa proteins on sodium dodecyl sulfate/polyacrylamide gel electrophoresis, which were significantly increased on the left side of schizophrenic superior temporal cortices, revealed that they were proteolytic fragments of the alpha subunit of fodrin, a major cytoskeletal protein underlying the plasma membrane. Immunoquantification using the specific antibodies against alpha and beta subunits of fodrin indicated that there exist concomitant decreases in the full-length 240-kDa form and increases in the 150-kDa form of alpha-fodrin with no changes of the 235-kDa form of beta-fodrin in the left superior temporal cortices of the schizophrenic brains. CONCLUSIONS The findings may be a possible molecular basis for linking morphometric changes to neurochemical pathophysiology in schizophrenia.
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Affiliation(s)
- N Kitamura
- Department of Psychiatry, Shinko Hospital, Kobe, Japan
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216
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Jones JM, Welty DJ, Nakai H. Versatile action of Escherichia coli ClpXP as protease or molecular chaperone for bacteriophage Mu transposition. J Biol Chem 1998; 273:459-65. [PMID: 9417104 DOI: 10.1074/jbc.273.1.459] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The molecular chaperone ClpX of Escherichia coli plays two distinct functions for bacteriophage Mu DNA replication by transposition. As specificity component of a chaperone-linked protease, it recognizes the Mu immunity repressor for degradation by the peptidase component ClpP, thus derepressing Mu transposition functions. After strand exchange has been promoted by MuA transposase, ClpX alone can alter the conformation of the transpososome (the complex of MuA with Mu ends), and the remodeled MuA promotes transition to replisome assembly. Although ClpXP can degrade MuA, the presence of both ClpP and ClpX in the reconstituted transposition system did not destroy MuA essential for initiation of DNA replication by specific host replication enzymes. Levels of ClpXP needed to overcome inhibition by the repressor did not prevent MuA from promoting strand transfer, and ClpP stimulated alteration of the transpososome by ClpX. Apparently intact MuA was still present in the resulting transpososome, promoting initiation of Mu DNA replication by specific replication enzymes. The results indicate that ClpXP can discriminate repressor and MuA in the transpososome as substrates of the protease or the molecular chaperone alone, degrading repressor while remodeling MuA for its next critical function.
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Affiliation(s)
- J M Jones
- Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, Washington, D. C. 20007, USA
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217
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Yang CQ, Kitamura N, Nishino N, Shirakawa O, Nakai H. Isotype-specific G protein abnormalities in the left superior temporal cortex and limbic structures of patients with chronic schizophrenia. Biol Psychiatry 1998; 43:12-9. [PMID: 9442339 DOI: 10.1016/s0006-3223(97)80250-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND The potential role of signal transducing guanine nucleotide-binding regulatory protein (G protein) in schizophrenia is largely unknown. METHODS We immunoquantified isotypes of G protein using specific antisera against alpha and beta subunits of G protein in the superior temporal, prefrontal, and entorhinal cortices as well as the nucleus accumbens and amygdala of postmortem brains from 19 schizophrenic and 28 control subjects. RESULTS In the left hemisphere of schizophrenics, the amount of Gi alpha, Go alpha, and Gq alpha but not that of Gs alpha or G beta decreased in the superior temporal cortex by 27%, 27%, and 16%, respectively, as compared with the values in ipsilateral controls; the amount of any G protein isotype in the prefrontal and entorhinal cortices was not changed. In the nucleus accumbens and amygdala, the paranoid type schizophrenics showed a smaller amount of Gi alpha and Go alpha than the disorganized type schizophrenics. In the right superior temporal cortex, the isotype amount did not differ between the schizophrenic and control groups. CONCLUSIONS The decreased Gq alpha immunoreactivity in the schizophrenic left superior temporal cortex may reflect the down-regulation of Gq alpha, resulting from chronic stimulation of Gq alpha-coupled receptors, while the decreased Gi alpha and Go alpha in the nucleus accumbens and amygdala of paranoid type schizophrenics may be related to the dopaminergic hyperactivity via dopamine D2 receptors.
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Affiliation(s)
- C Q Yang
- Department of Psychiatry and Neurology, Kobe University School of Medicine, Japan
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218
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Abstract
Initiation of Escherichia coli DNA synthesis primed by homologous recombination is believed to require the phiX174-type primosome, a mobile priming apparatus assembled without the initiator protein DnaA. We show that this primosome plays an essential role in bacteriophage Mu DNA replication by transposition. Upon promoting transfer of Mu ends to target DNA, the Mu transpososome undergoes transition to a pre-replisome that permits initiation of DNA synthesis only in the presence of primosome assembly proteins PriA, DnaT, DnaB and DnaC. These assembly proteins promote the engagement of primase and DNA polymerase III holoenzyme, initiating semi-discontinuous replication preferentially at the Mu left end. The results indicate that these proteins play a crucial role in promoting replisome assembly on a recombination intermediate.
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Affiliation(s)
- J M Jones
- Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, 3900 Reservoir Rd NW, Washington, DC 20007, USA
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219
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Iwai T, Yokota S, Nakao M, Kaneko H, Nakai H, Kashima K, Misawa S. Internal tandem duplication in the juxtatransmembrane domain of the flt3 is not involved in blastic crisis of chronic myeloid leukemia. Leukemia 1997; 11:1992-3. [PMID: 9369441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
MESH Headings
- Blast Crisis/genetics
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Neoplasm Proteins/genetics
- Proto-Oncogene Proteins/genetics
- RNA, Messenger/metabolism
- Receptor Protein-Tyrosine Kinases/genetics
- Vascular Endothelial Growth Factor Receptor-1
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220
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Suzuki K, Nishiyama N, Nemoto K, Asakura T, Nakai H. Effects of N-methacryloyl-omega-amino acid primer pretreatment on the bond strength of the resin to acid-etched dentin. J Biomed Mater Res 1997; 37:261-6. [PMID: 9358320 DOI: 10.1002/(sici)1097-4636(199711)37:2<261::aid-jbm16>3.0.co;2-h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To ascertain the adhesion mechanism of resins to etched dentin treated with hydrophilic primers such as N-methacryloyl-omega-amino acids (NM omega A), the effect of the application of NM omega A primers on the bond strength of the resin and also the characteristics of the "hybrid layer" were investigated. Here, the concept of "hybrid layer" has been proposed previously by Nakabayashi et al. When the demineralized dentin was treated with the NM omega A solution, the bond strength increased remarkably, thus indicating the formation of a hybrid layer. It can be construed that NM omega A primers allowed for diffusion of the bonding agent to the dentinal collageous layer that was exposed by acid etching, and thereby the creation of a hybrid layer. To obtain an understanding of how NM omega A primers improved bond strength at the interface between the resin and dentinal collagen, the 13C-NMR spectra of NM alpha A were observed in the absence and presence of demineralized dentin. The 13C peak intensities of all of the carbons of the NM alpha A species were dramatically reduced in the presence of the dentin. Specifically, the reduction of the carbon peak intensity of carboxylic acid in the NM alpha A species was reduced by 30%. This indicated that the unionized carboxylic acid in the NM alpha A primer interacted with the dentinal collagen. Thus, the composite resin can be considered to adhere to the dentinal collagen through the unionized NM alpha A that interacts with the dentinal collagen.
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Affiliation(s)
- K Suzuki
- Department of Dental Materials, Okayama University, Dental School, Japan
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221
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Yokoi M, Ito M, Izumi M, Miyazawa H, Nakai H, Hanaoka F. Molecular cloning of the cDNA for the catalytic subunit of plant DNA polymerase alpha and its cell-cycle dependent expression. Genes Cells 1997; 2:695-709. [PMID: 9491803 DOI: 10.1046/j.1365-2443.1997.1560354.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND DNA polymerase alpha has been studied in considerable detail in yeast and animals. Genetic and biochemical analyses reveal that this enzyme is composed of a heterotetramer and is necessary for replicon initiation and primer synthesis in lagging strand synthesis. In spite of the fact that modes of DNA replication in plants seem to be similar to those in other eukaryotes, very little is known about the biochemical components that participate in DNA replication of plants, including DNA polymerases. RESULTS Using a 561-base pair DNA fragment, obtained by polymerase chain reaction amplification from a rice cDNA library as a probe, we isolated and sequenced a cDNA homologous to the cDNA for the catalytic subunit of rice DNA polymerase alpha. The encoded polypeptide has extensive homology with the catalytic subunit of DNA polymerase alpha from several species. Furthermore, when the cDNA was expressed in eukaryotic transcription/translation systems, the protein products showed DNA polymerase activity which was inhibited by a monoclonal antibody specific for DNA polymerase alpha. Using RNA gel blot analysis, we found that the levels of mRNA of the catalytic subunit of this enzyme is regulated during the cell-cycle in plant cells. CONCLUSION This is the first report which describes the cDNA cloning of plant DNA polymerase. We conclude that the principal features of the DNA polymerase alpha catalytic subunit are conserved in plants.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antibodies, Blocking/immunology
- Base Sequence
- Blotting, Northern
- Cell Cycle
- Cells, Cultured
- Cloning, Molecular
- DNA Polymerase I/genetics
- DNA Polymerase I/immunology
- DNA Polymerase I/metabolism
- DNA, Complementary/genetics
- DNA, Plant/analysis
- DNA, Plant/genetics
- DNA, Plant/metabolism
- Gene Expression
- Gene Expression Regulation, Plant
- Gene Library
- Humans
- Mice
- Molecular Sequence Data
- Oryza/genetics
- Oryza/metabolism
- Phylogeny
- Polymerase Chain Reaction
- Protein Biosynthesis
- RNA, Messenger/analysis
- RNA, Messenger/metabolism
- RNA, Plant/genetics
- RNA, Plant/metabolism
- Ribonucleases/metabolism
- Saccharomyces cerevisiae/genetics
- Schizosaccharomyces/genetics
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Transcription, Genetic
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Affiliation(s)
- M Yokoi
- Institute for Molecular and Cellular Biology, Osaka University, Suita, Japan
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222
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Naruke T, Kondo T, Kondo H, Watanabe H, Sano T, Miyamoto H, Saeki H, Takahashi Y, Nakai H, Kureya T. [Bronchoplastic procedures for lung cancer]. Rinsho Kyobu Geka 1997; 7:434-9. [PMID: 9301795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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223
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Abstract
The immunity repressor (Rep) of bacteriophage Mu establishes and maintains lysogeny by shutting down transposition functions needed for phage DNA replication. Although Rep is stable in vivo, an altered immunity repressor (Vir) encoded by virulent, trans-dominant Mu mutants is rapidly degraded by Escherichia coli ClpXP protease. Rep and Vir are degraded at approximately the same maximal velocity (Vmax) by ClpXP, but the Km for Rep (3.6 microM) is over 20-fold higher than the Km for Vir (0.15 microM). Rep is also highly resistant to degradation in the presence of DNA whereas Vir is not. Vir increases the rate of Rep degradation by reducing its Km and imparts to Rep ClpXP sensitivity in the presence of DNA. Vir can drive at an accelerated rate the complete degradation of Rep molecules that outnumber Vir by eightfold or more. So long as Vir is present at a concentration of 0.1 microM or higher, Rep is degraded with a Km that is indistinguishable from that of Vir. These characteristics of repressor may be an important means of transducing physiological signals that induce Mu transposition in response to growth conditions or environmental stress, ClpXP hypersensitivity being disseminated among Rep molecules for the induction of Mu transposition.
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Affiliation(s)
- D J Welty
- Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, 3900 Reservoir Rd NW, Washington, DC 20007, USA
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224
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Konno M, Nakae T, Sakuyama S, Odagaki Y, Nakai H, Hamanaka N. Trisubstituted benzene leukotriene B4 receptor antagonists: synthesis and structure-activity relationships. Bioorg Med Chem 1997; 5:1649-74. [PMID: 9313868 DOI: 10.1016/s0968-0896(97)00089-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A series of trisubstituted benzenes which demonstrate leukotriene B4 (LTB4, 1) receptor affinity was prepared. Previous trisubstituted benzenes from our laboratory showed high affinity to the LTB4 receptor but demonstrated agonist activity in functional assays. Compound 3a, the initial lead compound of this new series, showed only modest affinity (IC50 = 0.20 microM). However, 3a was a receptor antagonist with no demonstrable agonist activity up to 30 microM. Further modification of the lipid tail and aryl head groups region led to the discovery of 3b (ONO-4057). This compound, free of agonist activity, possesses high affinity to the LTB4 receptor (Ki = 3.7 +/- 0.9 nM).
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Affiliation(s)
- M Konno
- Department of Medicinal Chemistry, Minase Research Institute, Ono Pharmaceutical Co., Ltd., Osaka, Japan
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225
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Okazaki M, Katakami N, Umeda B, Nishiuchi S, Nakai H. 301 Postoperative complications (POC) after induction chemoradiotherapy for non-small cell lung cancer (NSCLC). Lung Cancer 1997. [DOI: 10.1016/s0169-5002(97)89680-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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226
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Konno M, Nakae T, Sakuyama S, Nishizaki M, Odagaki Y, Nakai H, Hamanaka N. Synthesis of structural analogues of leukotriene B4 and their receptor binding activity. Bioorg Med Chem 1997; 5:1621-47. [PMID: 9313867 DOI: 10.1016/s0968-0896(97)00090-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Structural analogues of leukotriene B4 (LTB4) were designed based on the plausible conformation of LTB4 (1). Joining C-7-C-9 of the conformer A or B into an aromatic ring system led to the discovery of benzene analogues 2, 4 and 6a. Joining C-4-C-9 of the conformer C or D into an aromatic ring system led to the discovery of analogues 3, 5 and 7. The compounds examined in this study were evaluated as to their inhibition of [3H] LTB4 binding to human neutrophils, and by a secondary intact human neutrophil functional assay for agonist/antagonist activity. The first analogues prepared, compounds 2-7, demonstrated moderate potency in the LTB4 receptor binding assay. The modification of these compounds by the introduction of another substituent into the aromatic ring produced a marked increase in receptor binding (28c, IC50 = 0.020 microM; 38c, IC50 = 0.020 microM; 52a, IC50 = 0.020 microM; 52b, IC50 = 0.018 microM). Most of these structural analogues of LTB4 demonstrated agonist activity. Of the analogues prepared in this study, only compound 57 demonstrated weak LTB4 receptor antagonist activity, at 10 microM.
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Affiliation(s)
- M Konno
- Department of Medicinal Chemistry, Minase Research Institute, Ono Pharmaceutical Co., Ltd., Osaka, Japan
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227
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Motoyama O, Hasegawa A, Ohara T, Hattori M, Kawaguchi H, Takahashi K, Kamiyama Y, Nakai H, Shishido S, Ogawa O, Kawamura T, Tsuzuki K, Oshima S. A prospective trial of steroid cessation after renal transplantation in pediatric patients treated with cyclosporine and mizoribine. Pediatr Transplant 1997; 1:29-36. [PMID: 10084784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
We conducted a multi-center prospective study to evaluate the safety and efficacy of steroid withdrawal after renal transplantation in children. In 52 children (51 living-related donor transplants and 1 cadaver donor transplant), immunosuppressive therapy was started with cyclosporine (CyA), mizoribine (MZ), methylprednisolone (MPL) and anti-lymphocyte globulin. Administration of MPL was reduced to alternate days more than 6 months after transplantation, and attempts were made to withdraw it. Acute rejection was noted in 19 patients (36.5%) by 1 month after transplantation. The whole-blood CyA trough level using monoclonal antibody was 175.0+/-17.0 ng/ml in patients who developed acute rejection and 282.0+/-25.3 ng/ml in those who did not show acute rejection (p<0.01). During the 37 attempts at alternate-day MPL administration, clinical acute rejection was observed in only 1 patient and chronic rejection in 3. During 10 attempts to withdraw MPL, acute rejection was noted in 3 patients, but graft function recovered to the pre-rejection level after treatment of the acute rejection. At the last observation, graft function was lost in 3 patients, 22 were receiving MPL on alternate days, and MPL had been withdrawn from 7 for a mean period of 16.7 months. The survival rate of the patients and the grafts was 100% and 94% after an average follow-up period of 4 years. Evaluation of growth showed catch-up growth in all patients during the withdrawal period.
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Affiliation(s)
- O Motoyama
- First Department of Pediatrics, Toho University School of Medicine, Tokyo, Japan
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228
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Yamamoto M, Kamisue S, Sawamoto Y, Nakai H, Tanaka I, Shima M, Takamatsu J, Oguni T, Kinoshita S, Giddings JC, Yoshioka A. Factor IX inhibition and epitope localization of factor IX inhibitor antibodies in haemophilia B patients with anaphylactoid reactions. Haemophilia 1997; 3:189-93. [PMID: 27214803 DOI: 10.1046/j.1365-2516.1997.00070.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We describe the results of immunological studies, reaction kinetics and epitope localization of six inhibitor antibodies to factor IX (FIX) developed in severe haemophilia B patients. Three of the six patients had suffered recent anaphylactoid reactions to FIX concentrates, two others had in the past and one had none. All six inhibitors rapidly inactivated FIX activity in vitro, and the prominent immunoglobulin (IgG) subclass of the antibody was IgG4 when analysed with ELISA. Interestingly, we found an additional IgG1 component in the antibody samples from the patients who had recently experienced anaphylactoid reactions to FIX. When analysed with Western blotting in these three patients, the IgG4 antibody bound with enhanced affinity to the heavy chain or the light chain of FIX, and in two of the three the IgG1 antibody also bound strongly to the FIX heavy chain. The results suggest that the heavy chain of FIX might play a more significant role than the light chain in the pathogenesis of anaphylactoid reactions in haemophilia B patients with FIX inhibitors.
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Affiliation(s)
- M Yamamoto
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - S Kamisue
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - Y Sawamoto
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - H Nakai
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - I Tanaka
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - M Shima
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - J Takamatsu
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - T Oguni
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - S Kinoshita
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - J C Giddings
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
| | - A Yoshioka
- Department of Paediatrics, Nara Medical University, Kashihara, Nara 634, Japan,Paediatric Clinic, Gose Saiseikai Hospital, Gose, Nara 639-22, Japan,Division of Blood Transfusion Medicine, Nagoya University, Faculty of Medicine, Nagoya 466, Japan,Paediatric Clinic, Hirakata City Hospital, Hirakata, Osaka 573, Japan,Paediatric Clinic, National Osaka Hospital, Osaka 540, Japan,Department of Haematology, University of Wales College of Medicine, Cardiff, Wales
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229
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Izumoto S, Machida Y, Nishi H, Nakamura K, Nakai H, Sato T. Chromatography of crotamiton and its application to the determination of active ingredients in ointments. J Pharm Biomed Anal 1997; 15:1457-66. [PMID: 9226576 DOI: 10.1016/s0731-7085(96)02052-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Crotamiton, which is a mixture of cis and trans isomers, was investigated by several separation techniques. One of the HPLC modes, in which crotamiton eluted as a single peak, was selected for the determination of five active ingredients (crotamiton, prednisolone, glycyrrhetinic acid, dibucaine and chlorhexidine hydrochloride) in an ointment. The simultaneous determination was performed using isocratic reversed-phase mode within 20 min by employing an octyl (C8) column and a mobile phase containing sodium dodecyl sulfate (SDS) and 2-propanol. The method was successfully applied to quality control and stability testing of the ointment.
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Affiliation(s)
- S Izumoto
- Analytical Research Laboratory, Tanabe Seiyaku, Osaka, Japan
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230
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Prescott R, Nakai H, Saenko EL, Scharrer I, Nilsson IM, Humphries JE, Hurst D, Bray G, Scandella D. The inhibitor antibody response is more complex in hemophilia A patients than in most nonhemophiliacs with factor VIII autoantibodies. Recombinate and Kogenate Study Groups. Blood 1997; 89:3663-71. [PMID: 9160671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Approximately 25% of hemophilia A patients infused with factor VIII (fVIII) mount an immune response, which leads to its inactivation. Anti-fVIII autoantibodies are also seen rarely in individuals with normal fVIII. We have previously demonstrated that some anti-A2 and anti-C2 domain antibodies are fVIII inhibitors and that many patients have additional inhibitors with a fVIII light chain (LCh) epitope outside C2. Because the contribution of the different antibodies to the plasma inhibitor titer had been examined in a limited number of patients (14), we report in this study a more extensive analysis of 55 plasmas. The dominant inhibitors in 62% (13 of 21) of autoantibody plasmas were directed only against C2 or A2, but not both, whereas this pattern was found in only 15% (5 of 34) of hemophilic plasmas. In addition, anti-A2 inhibitors were present in 71% (24 of 34) of hemophilic plasmas, but only 33% (7 of 21) of autoantibody plasmas. These results demonstrated that the inhibitor response in hemophiliacs was more complex and the epitope specificity was somewhat different. A comparison of hemophiliacs treated only with plasma fVIII or recombinant fVIII showed no significant differences in the complexity of the inhibitor response, as > or = 2 different inhibitor antibodies were present in 78% (18 of 23) of the former and 82% (9 of 11) of the latter. In contrast, the major inhibitors in 35% (8 of 23) of hemophiliacs treated with plasma fVIII were directed against C2 and another LCh epitope within residues 1649-2137, but not A2, while none (0 of 11) treated with recombinant fVIII had this pattern.
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Affiliation(s)
- R Prescott
- American Red Cross, Rockville, MD 20855, USA
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231
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Nakayama Y, Senokuchi K, Sakaki K, Kato M, Maruyama T, Miyazaki T, Ito H, Nakai H, Kawamura M. New serine protease inhibitors with leukotriene B4 (LTB4) receptor binding affinity. Bioorg Med Chem 1997; 5:971-85. [PMID: 9208106 DOI: 10.1016/s0968-0896(97)00036-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A series of new trypsin-like serine protease inhibitors, 1, 2 and 7-23, containing amidinobenzene moiety was found to show potent LTB4-receptor affinity. Among them, compounds 1 and 2 were found to be LTB4 receptor antagonists based on an inhibition assay of human polymorphonuclear neutrophil (PMN) intracellular calcium mobilization induced by LTB4. Compounds 1 and 2, which satisfy the reported structural requirements for good oral activity, are expected to show a balanced dual mode of action, i.e., protease inhibitory activity and LTB4 receptor antagonist activity, in vivo.
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Affiliation(s)
- Y Nakayama
- Minase Research Institute, Ono Pharmaceutical Co., Ltd, Osaka, Japan
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232
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Suzuki H, Shima M, Arai M, Kagawa K, Fukutake K, Kamisue S, Nakai H, Morichika S, Tanaka I, Inoue M, Gale K, Tuddenham EG, Yoshioka A. Factor VIII Ise (R2159C) in a patient with mild hemophilia A, an abnormal factor VIII with retention of function but modification of C2 epitopes. Thromb Haemost 1997; 77:862-7. [PMID: 9184393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We found a patient with mild hemophilia A who had no detectable factor VIII antigen (FVIII:Ag), as shown by two-site ELISA using inhibitor alloantibodies (TK). We then analyzed A2, A2/B, and C2 antigen of the patient's DDAVP-induced FVIII using several anti-FVIII monoclonal antibodies. Factor VIII activity (FVIII:C) was increased from 12 to 42 U/dl by the administration of DDAVP. The DDAVP-induced increases in the A2 and A2/B antigens were 40 and 36 U/dl, respectively. However, the increase in the C2 antigen was only 7.5 U/dl. SSCP analysis and subsequent sequencing demonstrated an Arg to Cys transition at codon 2159. The anti-FVIII:C titer of monoclonal antibody, NMC-VIII/5 which recognized the C2 domain, against normal plasma was 450 Bethesda U/mg of IgG. However, the titer against DDAVP-treated patient's plasma was only 15 Bethesda U/mg. We also tested DDAVP-induced increase in the FVIII:Ag in another mild hemophilia A patient with the same mutation at Arg2159. Increase in his C2 antigen levels was only 19% of those in the A2 and A2/B antigen. We designate this abnormal FVIII as FVIII Ise. Our results show that a missense mutation at Arg2159 to Cys modifies the antigenicity of the C2 domain.
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Affiliation(s)
- H Suzuki
- Department of Pediatrics, Nara Medical University, Japan
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233
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Sako K, Nakai H, Hashizume A, Aizawa S, Suzuki N, Yonemasu Y. Aneurysms located at the horizontal segment of the anterior cerebral artery or the middle cerebral artery. Neurol Med Chir (Tokyo) 1997; 37:387-91. [PMID: 9184436 DOI: 10.2176/nmc.37.387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Aneurysms at the horizontal segment of the middle cerebral artery or anterior cerebral artery are relatively rare. The characteristics of 13 cases were analyzed retrospectively. Six of the 13 cases had multiple aneurysms, nine had aneurysmal rupture, and three of these nine were complicated by intracerebral hematoma. Neck clipping of the aneurysm was performed in 11 cases and four developed new cerebral infarction in the territory of the perforating arteries. Overall mortality and morbidity was 15% and 38%, respectively. The outcome for patients with aneurysms at these sites was evidently poorer than for those with aneurysms at other sites.
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Affiliation(s)
- K Sako
- Department of Neurosurgery, Asahikawa Medical College, Hokkaido
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234
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Kawai H, Nakai H, Suga M, Yuki S, Watanabe T, Saito KI. Effects of a novel free radical scavenger, MCl-186, on ischemic brain damage in the rat distal middle cerebral artery occlusion model. J Pharmacol Exp Ther 1997; 281:921-7. [PMID: 9152402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
We investigated the effects of a free radical scavenger, 3-methyl-1-phenyl-2-pyrazolin-5-one (MCl-186), on infarct areas, neurological deficits and regional cerebral blood flow (rCBF), with use of a rat thrombotic distal middle cerebral artery (dMCA) occlusion model to elucidate its possible therapeutic effects on focal cerebral ischemia. In addition, we have attempted to measure 2-oxo-3-(phenylhydrazono)-butanoic acid (OPB), which is the major oxidation product of MCl-186, in the penumbral cortex of a thrombotic dMCA occlusion model. Postischemic treatment with MCl-186 (3 mg/kg) significantly (P < .05) decreased the size of the cerebral infarcts 1 day after dMCA occlusion. MCl-186 (3 mg/kg) significantly (P < .05) improved the neurological deficits 1 day after dMCA occlusion. On the contrary, MCl-186 had no effect on rCBF 1 day after dMCA occlusion. MCl-186 mainly reacted into OPB by peroxidation in rat brain homogenates. Furthermore, the increase in OPB content in the ischemic penumbral cortex tissue was confirmed after 90 min of MCl-186 perfusion. These results suggest that MCI-186 has a protective effect on brain ischemia by reacting with oxygen radicals and that oxygen radicals are closely related to postischemic brain injury.
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Affiliation(s)
- H Kawai
- Pharmaceuticals Laboratory 2, Yokohama Research Center, Mitsubishi Chemical Corporation, Japan
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235
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Abstract
A 19-year-old female presented with an unusual glial cyst of the thalamus that caused development of acute hydrocephalus due to hemorrhage and manifested as headache and fainting attacks. Computed tomography showed a large cystic mass lesion in the left thalamus with intracystic hemorrhage. The cyst was subtotally removed. Microscopic examination revealed mild gliosis with marked hemosiderin deposits. The inner surface of the cystic wall lacked an epithelial lining. The diagnosis was glial cyst. Magnetic resonance (MR) imaging 2 months after surgery showed a residual cyst in the left thalamus. However, after 12 months she was asymptomatic, neurologically intact, and MR imaging showed no regrowth of the cyst. Treatment of glial cyst must provide sufficient communication between the cyst and the cerebral ventricles rather than attempt total removal of the cyst, which may present a considerable challenge.
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Affiliation(s)
- N Tokumitsu
- Department of Neurosurgery, Asahikawa Medical College, Hokkaido
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236
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Sato A, Imaizumi M, Koizumi Y, Obara Y, Nakai H, Noro T, Saito T, Saisho T, Yoshinari M, Cui Y, Suzuki H, Funato T, Iinuma K. Acute myelogenous leukaemia with t(8;21) translocation of normal cell origin in mosaic Down's syndrome with isochromosome 21q. Br J Haematol 1997; 96:614-6. [PMID: 9054671 DOI: 10.1046/j.1365-2141.1997.d01-2078.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report a 13-year-old girl with Down's syndrome (DS) having a mosaic karyotype of 46,XX/46,XX, -21,+i(21q), who developed acute myelogenous leukaemia (AML) (FAB M1). The t(8;21) translocation generating a AML1/MTG8 chimaeric gene of her blasts was demonstrated by cytogenetic analysis and reverse transcription-polymerase chain reaction. Interestingly, the leukaemic clone with t(8;21) did not have isochromosome 21q, indicating that the blasts were of normal cell origin. These findings suggest that, in older patients with DS, 21 trisomy cells have no greater predisposition to develop AML than normal karyotypic cells.
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MESH Headings
- Adolescent
- Chromosomes, Human, Pair 21
- Chromosomes, Human, Pair 8
- Down Syndrome/complications
- Down Syndrome/genetics
- Female
- Humans
- In Situ Hybridization, Fluorescence
- Isochromosomes
- Leukemia, Myeloid, Acute/complications
- Leukemia, Myeloid, Acute/genetics
- Mosaicism
- Polymerase Chain Reaction
- Translocation, Genetic
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Affiliation(s)
- A Sato
- Department of Paediatrics, Tohoku University School of Medicine, Sendai, Japan
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237
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Hashimoto A, Nakamura T, Kokusenya Y, Nakai H, Sato T. Studies on the "signal" constituents for the evaluation of animal crude drugs. III. Nucleic acid components. Chem Pharm Bull (Tokyo) 1997; 45:487-91. [PMID: 9162597 DOI: 10.1248/cpb.45.487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An analytical method for determining the contents of 7 nucleic acid bases, 6 ribonucleosides and 5 deoxyribonucleosides in animal crude drugs were established. The contents in free nucleic acid components (the ice-cold extracts) and in total nucleic acid components (the heated extracts) of 8 crude drugs were quite different from one another, indicating that these content patterns could be used as a "signal" of each animal crude drug. For example, the contents of inosine in Lumbricus, uracil in Cervi Parvum Cornu, and guanine and hypoxanthine in Hippocampus were high. The total contents in each crude drug were about twice or three times as large as the free contents. The main degradation products by the heated extracts were adenine and guanine. These results suggested that the contents of nucleic acid components could be one of the "signal" constituents for evaluation of animal crude drugs.
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Affiliation(s)
- A Hashimoto
- Analytical Research Laboratory, Tanabe Seiyaku Co., Ltd., Osaka, Japan
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238
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Sawamoto Y, Shima M, Tanaka I, Nakai H, Kamisue S, Scandella D, Yoshioka A. Anti-factor VIII inhibitor alloantibodies recognizing the A2 domain in the human factor VIII heavy chain poorly bind to porcine factor VIII. Int J Hematol 1997; 65:151-8. [PMID: 9071819 DOI: 10.1016/s0925-5710(96)00555-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Anti-factor VIII (FVIII) inhibitor alloantibodies from 11 patients with hemophilia A, along with five anti-FVIII neutralizing monoclonal antibodies, were examined for differences in their reactivities with the A2 and C2 domains of human and porcine FVIII. None of the patients had been previously treated with porcine FVIII. Six inhibitors which specifically recognized the human FVIII C2 domain bound to both the 76-kDa porcine FVIII light chain and its 69-kDa proteolyzed fragments, showing cross-reactivity against porcine FVIII between 33 and 100%. Two A2-specific inhibitors did not react with porcine FVIII. The cross-reactivity was low (0-0.5%). The inhibitors recognizing both C2 and A2 reacted with the 76- and 69-kDa bands of porcine FVIII light chain, with cross-reactivity of between 11 and 33%. Monoclonal antibodies recognizing A1 (C-5) and A2 (JR8) did not react with the porcine FVIII. No anti-porcine FVIII neutralizing activity was detected in these antibodies. Monoclonal antibodies to the amino-terminal portion of A3 (NMC-VIII/10 and C-2) poorly reacted with the 76-kDa band, the cross-reactivities being 0 and 0.5%, respectively. NMC-VIII/5 recognizing C2 which competes with the C2-specific inhibitor, reacted with both the 76- and 69-kDa fragments showing cross-reactivity of 13%. These findings suggest that porcine A2 is antigenically different from human A2. The A2-specific inhibitor is a useful indicator for therapy with porcine FVIII.
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Affiliation(s)
- Y Sawamoto
- Department of Pediatrics, Nara Medical College, Japan
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239
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Kawamura M, Nakai H, Uchiyama T, Takai Y, Sawada M. Synthesis of methyl 6-O-beta-inulotriosyl-alpha-D-glucopyranoside by intermolecular transglycosylation reaction of cycloinulo-oligosaccharide fructanotransferase. Carbohydr Res 1997; 297:187-90. [PMID: 9060186 DOI: 10.1016/s0008-6215(96)00264-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Incubation of cycloinulohexaose and methyl alpha-D-glucopyranoside in the presence of cycloinulo-oligosaccharide fructanotransferase gave some hetero-oligosaccharides. The main product was a tetrasaccharide whose sugar composition was methyl alpha-D-glucopyranoside-D-fructose in a ratio 1:3. This oligosaccharide was isolated from the reaction mixture by charcoal-column chromatography and was identified as methyl O-beta-D-fructofuranosyl-(2--> 1)-O-beta-D-fructofuranosyl-(2-->1)-O-beta-D-fructofuranosyl-(2-->6)- alpha-D-glucopyranoside (methyl 6-O-beta-inulotriosyl-alpha-D-glucopyranoside), by two-dimensional NMR spectroscopy.
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Affiliation(s)
- M Kawamura
- Department of Biology, Osaka Kyoiku University, Japan
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240
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241
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Imaki K, Okada T, Nakayama Y, Nagao Y, Kobayashi K, Sakai Y, Mohri T, Amino T, Nakai H, Kawamura M. Non-peptidic inhibitors of human neutrophil elastase: the design and synthesis of sulfonanilide-containing inhibitors. Bioorg Med Chem 1996; 4:2115-34. [PMID: 9022976 DOI: 10.1016/s0968-0896(96)00216-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A novel series of pivaloyloxy benzene derivatives has been identified as potent and selective human neutrophil elastase (HNE) inhibitors. Convergent syntheses were developed in order to identify the inhibitors which are intravenously effective in an animal model. A compound of particular interest is the sulfonanilide-containing analogues. Structure-activity relationships are discussed. Structural requirements for metabolic stabilization are also discussed.
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Affiliation(s)
- K Imaki
- Department of Medicinal Chemistry, Minase Research Institute, Ono Pharmaceutical Co., Ltd., Osaka, Japan
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242
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Abstract
The present study investigates the effect of storage in water on hygroscopic expansion and shear bond strength to dentin at periods up to 1 week, of the resin-modified glass ionomers for base/liner, and to analyze the effect on the marginal gaps in dentin cavities. For polishing after storage in water for 1 day, the material indicated significantly smaller marginal gaps both in dentin and in Teflon cavities than in those immediately after light-activation. For the results of after storage in water for 1 day, the material indicated significantly greater bond strength than material immediately after light-activation. The improvement of marginal sealability in dentin cavities may be performed not only by hygroscopic expansion during storage in water but also by greater bond strength after the setting reaction which continues to advance during storage in water.
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Affiliation(s)
- M Irie
- Department of Dental Materials, Okayama University Dental School, Japan
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243
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Sarnacki S, Nakai H, Révillon Y, Calise D, Astarioglu I, Azuma T, Brousse N, Cerf-Bensussan N. Étude du chimérisme et du phénotype des cellules infiltrants les greffons intestinaux tolérés dans le modèle de tolérance induite par la transplantation hépatique chez le rat. Arch Pediatr 1996. [DOI: 10.1016/s0929-693x(97)85950-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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244
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Noma S, Nakai H, Okada T, Sano A, Tachiiri S, Kuroda Y. Systemic arterial supply to normal basilar segments of the left lower lobe: role of continuous thin sliced CT. Radiat Med 1996; 14:325-9. [PMID: 9132814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A rare congenital anomaly of the left lower pulmonary artery is presented. A 39-year-old woman was admitted to our hospital for evaluation of a splenic mass. Abdominal CT disclosed abnormal vessels in the left lower lobe. Angiography revealed a large systemic artery from the descending aorta supplying the basilar segments of the left lower lobe. Continuous thin sliced CT revealed the anatomical details of this anomaly and showed that the tracheobronchial tree had a normal connection with the lung parenchyma. Although the volume of the left lower lobe was reduced, there were no symptoms related to this lesion. Since the splenic lesion was malignant lymphoma limited to the spleen, only splenectomy was performed. In spite of intensive systemic chemotherapy following the operation, there were no pulmonary complications. Although surgery may be necessary in the future, observation alone has been carried out for more than 3 years because of the lack of symptoms and normal pulmonary function. Continuous thin sliced CT was useful in evaluating this anomaly.
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Affiliation(s)
- S Noma
- Department of Radiology, Tenri Hospital, Nara, Japan
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245
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Ishii K, Wakamoto S, Nakai H, Sato T. Assay of four stereoisomers of desacetyl diltiazem hydrochloride. Application toin vitro chiral inversion studies. Chromatographia 1996. [DOI: 10.1007/bf02271021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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246
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Higuchi A, Nakai H, Miyazato M, Izumitani M, Shishido S, Kawamura T. [Intermittent hydronephrosis. A clinical study in 23 pediatric patients]. Nihon Hinyokika Gakkai Zasshi 1996; 87:1145-50. [PMID: 8937109 DOI: 10.5980/jpnjurol1989.87.1145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND It is difficult to diagnose intermittent hydronephrosis and to decide the indication of surgical intervention. We investigated 23 cases of intermittent hydronephrosis. METHODS From 1978 to 1995, a total of 23 patients were diagnosed as intermittent hydronephrosis in our institution. We inspected their clinical features and treatment which had been performed to them. RESULTS Our study comprised 21 boys and 2 girls, whose mean age was 6 year old. Their chief complaint was intermittent flank pain (left: 21, right: 1, bilateral: 1) accompanied with gross hematuria (30%) and vomiting (39%). When they were asymptomatic, an excretory urogram revealed only mild pelvic dilatation without calyceal distension and kinking of ureteropelvic junction. Split renal function study by RI showed no difference between the affected side and the normal side except one case. When pelvic or calyceal enlargement was confirmed on ultrasonography while they were symptomatic, surgery was indicated. Surgery was performed in 17 cases (74%) including dismembered pyeloplasty in 14 cases, resection of aberrant vessel in 1, relocation of lower pole renal vessel in 1 and nephrectomy in 1. In surgical and histological view points, intrinsic stenosis was seen in 10 cases, extrinsic obstruction caused by aberrant vessels was seen in 4 and ureteral polyp was seen in 3 (bilateral polyp in 1 case). CONCLUSION They had no more symptoms after operation. Of 23 among followed up cases without surgery, we experienced 2 cases unexpectedly advancing irreversible hydronephrotic change after the last attack, 1 case of gradually progressing hydronephrotic change and 1 case of severe renal dysfunction after many attacks. Therefore intermittent hydronephrosis should be followed up carefully.
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Affiliation(s)
- A Higuchi
- Department of Urology, Tokyo Metropolitan, Kiyose Children's Hospital
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247
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Nishi H, Nakamura K, Nakai H, Sato T. Enantiomer separation by capillary electrophoresis using DEAE-dextran and aminoglycosidic antibiotics. Chromatographia 1996. [DOI: 10.1007/bf02271023] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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248
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Sawamoto Y, Shima M, Yamamoto M, Kamisue S, Nakai H, Tanaka I, Hayashi K, Giddings JC, Yoshioka A. Measurement of anti-factor IX IgG subclasses in haemophilia B patients who developed inhibitors with episodes of allergic reactions to factor IX concentrates. Thromb Res 1996; 83:279-86. [PMID: 8870172 DOI: 10.1016/0049-3848(96)00136-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We have established a simple enzyme-linked immunosorbent assay (ELISA) for the detection of anti-factor IX IgG subclasses in haemophilia B patients with inhibitors. The assay was performed using immobilized purified factor IX. Specific IgG subclasses were detected by peroxidase-conjugated anti-human IgG1,2,3 and 4. Ten plasma samples from 6 haemophilia B patients with inhibitors ranging from 1.0 to 253 Bethesda Units/ml were analyzed. All samples were positive for IgG4. Six out of 10 samples were positive only for IgG4. Three samples were positive for IgG2. Five of the 6 patients had previously had allergic reactions to factor IX concentrates. Three patients had allergic episodes within the past month. Three samples from these latter patients taken on the day when the allergy had occurred showed positive also for IgG1. In later samples, however, taken at 4 days and 4 weeks respectively from two of these same patients. IgG1 was not detected. In two of the five patients in whom allergic reactions had occurred more than one month previously IgG1 was not detected. The results suggested that allergic reactions in patients with haemophilia B treated with factor IX concentrates were associated with the development of the specific IgG1 subclass of antibody to factor IX.
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Affiliation(s)
- Y Sawamoto
- Department of Paediatrics, Nara Medical University, Japan
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249
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Odagaki Y, Nakai H, Senokuchi K, Kawamura M, Hamanaka N, Nakamura M, Tomoo K, Ishida T. Unique binding of a novel synthetic inhibitor to bovine trypsin. Acta Crystallogr A 1996. [DOI: 10.1107/s010876739609112x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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250
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Fujimoto T, Niimi A, Nakai H, Ueda M. Osseointegrated implants in a patient with osteoporosis: a case report. Int J Oral Maxillofac Implants 1996; 11:539-42. [PMID: 8803351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Osteoporosis is a relative contraindication for osseointegrated implants. This article describes a patient with severe osteoporosis who underwent implant therapy in the mandible. The treatment was carried out in a conventional manner, except for a longer healing period (6 months). All implants had clinically osseointegrated. Furthermore, there was no problem after the superstructure was placed.
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Affiliation(s)
- T Fujimoto
- Department of Oral Surgery, Nagoya University School of Medicine, Japan
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